Rolling mill construction



Nov. 14, 1967 Filed July 1'7, 1963 H. PAWALKAT ROLLING MILL CONSTRUCTION4 Sheets-Sheet 1 Honsf PA \JAL KAT ATTORNYS H. FAWALKATv ROLLING MILLCONSTRUCTION 4 Sheets-Sheet z Wyn/r09 HORST PAWALKA.

A 1" r0 R NE ys 'Nov. 14, 1967 Filed July 17, 1965 4 Sheets-Sheet 3Filed July 1'7, 1963 W n r0? 'HORSTIDAWAL KAT ATTORNEYS Nov. 14, 1967Filed July 17, 1963 H PAWALKAT ROLLING MILL CONSTRUCTION 4 Sheets-Sheet4 Mrawrae HORST PALJAL KAT 'M MJJTMW A TTOR/VE Y5 United States Patent3,352,140 ROLLING MILL CONSTRUCTION Horst Pawalkat, Leverkusen, Germany,assignor to Thendor Wuppermann GmbH, Leverkusen, Germany Filed July 17,1963, Ser. No. 295,651 Claims priority, application Germany, July 25,1962, W 32,671, W 32,672 12 Claims. (Cl. 72-238) This invention relatesin general to rolling mill construction and in particular to a new anduseful rolling mill, particularly for cold shaping having rolls mountedin a driving sleeve arrangement for effecting better driving efiiciencyand easy removal and replacement of the rolls.

The present invention has particular application with respect to rollingmills where several horizontal roll pairs are arranged in successivearrangement and where they would be likely to be arranged forcooperation with vertical rolls arranged in a shaping plane. Devices areknown which manufacture sections from strip material and which includeseveral successively arranged stands with horizontal and verticalshaping rolls. As the strip is passed through the shaping rolls, some ofwhich may be driven and some of which may not be driven, the shaping maycontinue until the desired finish shaping is achieved by employing rollshaving a cross section formed corresponding to the individual stages ofdeformation. With devices of this nature, it is usual to fit the shapingrolls on the shaft which carries them. These working shafts are mountedin housings by chocks. The shaping rolls themselves are usually arrangedbetween the housing and in some instances they are partly arrangedoutside the housing in an overhung position. Devices of this naturesometimes'include vertical rolls which are also partly mounted outsidethe housings and in transverses which also connect the two workingshafts. The disadvantage of such constructions is that it is difiicultto effect disassembly of the rolls which may be required for replacementof same.

In accordance with the present invention, there is provided a novelconstruction of roll stand which includesa novel mounting for the rollspermitting their easy removal and replacement, and further permitting abetter and more expedient utilization of the rolling program in ashaping mill where several of the cold shaping rolling mills ofdifferent size and having different working shaft diameters areemployed.

In accordance with a preferred arrangement of the invention, the workingshafts which carry the horizontal rolls are secured against axialdisplacement and are engaged in a driving sleeve member which isrotatably mounted at the bearing of the housing. The sleeve memberadvantageously includes means for easily connecting the sleeve fortransmission of a driving torque and may easily be coupled to the shaftof the roll such as by squaring, splines, or even by wedging or keying.The working side of the chock in the roll stand is advantageously,mounted so that it may be removed from the roll stand together with theworking shaft which is assigned to it. In a preferred arrangement one ofthe upright supporting elements of the stand rotatably carries theremovable chock or sleeve, and the other stand carries a chock havingabutrnents which prevent axial displacement of the roll stand andtransmit axial forces.

With the invention a driving torque may be introduced into the sleevecarrying the working shaft which is transmitted to the shaft foroperation. For rapid change of the working shaft and its associatedroll, it is merely necessary to release the means preventing axialdisplacement of the sleeve and the shaft, and the entire working shaftwith the sleeve may be pulled or extracted from the stand and replacedby another working shaft which has advantageously been previously fittedwith different shaping rolls and arranged in a separate driving sleeveelement.

If necessary, the new working shaft may have a diameter differing fromthe first shaft at the location where the shaping rolls are in contact.Thus, the invention makes it possible where there are several systemsfor section production in a shaping mill to provide many shaping rollsets of a variety of diameters in order to expedite the programming.

In a cold shaping rolling mill having overhung horizontal rolls andvertical rolls working in conjunction with the horizontal rolls in thesame plane, it is advantageous for the easy and rapid removal of therolls too lodge one of the two horizontally extending vertical rollholders in a separate auxiliary housing arranged laterally of the rollstand. The other roll holder is guided between the working side chock ofthe upper and lower horizontal roll and is fastened to the roll stand.Thus for example, the auxiliary housing can be braced againstthe rollstand by means of tractor screws arranged on both sides. The arrangementavoids on the one hand the disadvantage occurring in known cold shapingrolling mills with horizontal and vertical rolls that the free shaftends of the horizontal rolls having a traverse for carrying the verticalrolls are torsioned causing heavy bending stresses during operation. Dueto this, shaft failure often occurs which naturally causes seriousproduction trouble.

It is accordingly an object of the present invention to provide animproved roll stand construction.

A further object of the invention is to provide a roll stand in whichthe working shaft of the rolls is secured in a rotatable sleeve memberof one of the upright elements of the roll stand housing.

A further object of the invention is to provide a roll stand having anarrangement for mounting the rolls to permit their easy removal andreplacement for facilitating rapid change of rolls.

A further object of the invention is to provide an improved roll standincluding a roll stand housing having uprightstand elements eachcarrying chocks for rotatably supporting the rolls wherein one of thechocks includes a displaoeable sleeve member which is adapted to bedirectly connected to a torque applying device for driving the roll, thesleeve member being easily securable to the driving shaft of the rollstand for transmitting the torque thereto.

A further object of the invention is to provide a rolling mill and rollstand therefor which is simply in design, rugged in construction andeconomical to manufacture.

The various features of novelty which characterize the invention arepointed out with particularity in the claims annexed to and forming apart of this specification. For a better understanding of the invention,its operating advantages and specific objects attained by its use,reference should be had to the accompanying drawings anddescriptivematter in Which, there is illustrated and described a preferredembodiment of the invention.

In the drawings:

FIGS. 1a and lb are a partial side elevation and partial transversesections of a complete roll stand with an auxiliary roll housingconstructed in accordance with the invention taken on lines la, b; la, bof FIG. 3;

FIG. ,2 is a partial plan and partial sectional view taken on the line22 of FIG. 1;

FIG. 3 is a partial end elevation and partial sectional view taken onthe line 33 of FIG. 1.

Referring to the drawings in particular,-the invention embodied thereincomprises a roll stand generally designated 60 which includes a rollstand base portion 3 on each side of which are carried upright standelements 3a and 317 for the working side and drive side respectively. Onthe working side 3a there is arranged a lower chock assembly generallydesignated 4 and an upper chock assembly generally designated 5 whichtogether with a laterally spaced lower chock assembly generallydesignated 6 and upper chock assembly generally designated 7 onthe-drive side support working shafts 1a and 1b respectively forvertical adjustable movement.

All of the chock assemblies 4, 5, 6 and 7 are adjustably carried inguide ways 8 and 9. The working side chocks 4 and 5 are designed so thatthey permit an axial displacement in relation to the span. The driveside chocks 6 and 7 carry an abutment which prevents the chocks frommoving axially.

The working shafts 1a and 1b are mounted in the working side chocks 4and 5 respectively by means of multi-roll roller bearings 11. Thearrangement of the roller bearings together with the chocks is such thatthere is produced between the center of the upper working shaft, 1b andthe center of the lower working shaft 1a, a minimum dimension so thatsections can still be rolled which for their production require shapingrolls of minimum diameter.

n the drive side of the stand, working shafts 1a and 1b are connectedwith sleeves 13 which are provided in each chock assembly 6 and 7. Theconnection between the sleeve and the shaft is such that there will bepositive transmission of force slip-free in radial as well as axialdirection. a

As indicated in FIG. 1, for example, the connection between the shaft 1aand the sleeve 13 is made by providing the working shaft with anexternal square 19 and the sleeve 13 with a corresponding internalsquare. Alternatively a selected geometrical cross sectional form, suchas a triangle, a polygon, or a so-called K-profile may be made to insurea positive transmission of the torque in a radial direction. Theconnection may also be established through a r'nulti-wed'ge shaft and amultiwedge bushing or through spline and similar known means.

To prevent axial displacement of the working shafts 1a and 1b relativeto the associated sleeve 13, for example as indicated in FIG. 1, thereis provided a transverse wedge 14 which extends through thesleeves 13,13 and the associated working shaft. The wedge 14 carries at its taperedend a thread 15. The transverse wedge 14 is secured against displacementby a disc 16 and nut 17 which is secured over the thread 15. Acylindrical or conical pin or similar known means for the connection ofthe two cylindrical parts may be used. The sleeves 13 of each chock 6and 7 carry on their outermost ends a flange 18 provided for coupling anelement such as a cardan s haft 'or similar means for imparting adriving torque to "the sleeve.

Each sleeve 13 is mounted within its associated chock assembly on rollerbearing 20. The arrangement of such roller bearing and the chocks 6 and7 are such that shaping rolls of minimum diameter can be used. Axialforces are absorbed by thrust bearings 21 and 22 acting on both sides ofthe shaft and carried within the chock assemblies 6 and 7. Bearings 21and 22 transmit axial forces through the abutment 10 to the'roll stand.The adjustment of the upper chocks and 7 vertically is made throughthreaded spindles 24 which are moved through a worm gear 25 by means ofa hand Wheel 26. The vertical adjustment of the lower chocks 4 and 6 ismade through pressure screws Between the working side chocks 4 and 5 'ofthe upper and lower horizontal rolls 1a and 1b there is located avertical roll holder 28 which permits adjustment for a spindle 29 of avertical roll shoe 30 and hence of a vertical roll 31 which is carriedby the shoe. On the opposite side the same arrangement of a verticalroll holder 28 spindle 29 and vertical roll shoe 30 with vertical roll31 is provided. The right and left vertical rolls which are to beemployed may be of different forms when the section to be reproduced byrolling so requires.

As indicated best in FIG. 2, the vertical roll holder 28 has an arm 32on which is rotatable an axle 34 on which a sprocket wheel 33 isafiixed. Shaft 34 extends outwardly so that it may be rotated bysuitable means such as a wrench for adjustment of the left vertical roll31 from one side. The right hand vertical roll arrangement is connectedwith the stand, but the left hand vertical roll arrangement, whichconsists of the roll holder 28, spindle 29 and roll shaft 30 with rolls31 is carried by separate auxiliary stand 35. For a better absorption ofthe axial forces from the vertical rolls, the auxiliary stand 35 isconnected by means of two tractor screws 36 with the actual roll stand33 (FIG. 2). The sprocket wheel 33 connects to a sprocket wheel 62through a sprocket chain 64. Rotation of the sprocket wheel 62 iseffective to shift the position of the roll shaft 30 which rotatablysupports one of the vertical rolls 31.

The auxiliary stand 35 and the roll stand 33 are fastened by means ofbolts 37, 37 and 38, 38 respectively, to the base plate 39. To permitsatisfactory alignment the stand 3 and the auxiliary stand 35 are guidedby a spline connection.

While a specific embodiment of the invention has been shown anddescribed in detail to illustrate the application of the inventiveprinciples, it will be understood that the invention may be embodiedotherwise without departing from such principles.

What is claimed is:

1. A rolling mill in particular a cold shaping rolling mill having atleast one horizontal rolling pair and preferably being adapted forcooperation with a vertical roll pair arranged in a shaping planetherewith, comprising a roll stand, a torque transmission sleeve memberrotatably mounted in said stand, and a roll member having a workingshaft adapted to be connected to said sleeve member for rotationtherewith, said sleeve member being held in said stand at an axiallyfixed position, said roll member being a horizontal roll and extendingoutwardly from one side of said roll stand in an overhung manner, aseparate auxiliary stand aligned with said roll stand, and means on saidauxiliary stand for rotatably supporting a plurality of vertical rollersfor cooperation with said horizontal roll adjacent the overhung portion.

2. A rolling mill according to claim 1 including means for shifting saidvertical rolls laterally.

3. A rolling mill according to claim 2 wherein said means for shiftingsaid vertical rolls laterally includes a horizontal roll holder, a shoeslidable in said roll holder for shifting said vertical rolls and athreaded member for shifting said shoe.

4. A metal rolling device comprising an upright roll supporting standdefining first and second spaced bearing supports for supporting a millroll, one of said bearing supports including a stationary bearing and asleeve rotatable in said stationary bearing, a mill roll having aworking shaft, said working shaft adapted to extend through said firstbearing support and being rotatable therein, a sleeve rotatable in saidsecond bearing support and adapted to be connected to said working shaftand rotatably supporting said working shaft, a second mill rollrotatably supported in said stand above said mill roll for cooperationtherewith, said mill rolls being horizontal rollers and each extendingoutwardly from said stand in an overhung manner, and auxiliary rollstand means in- .cluding a pair of vertical rolls rotatably supportedthereby for cooperation with the overhung portion at a location adjacentthe overhung portions of said mill roll and said second millroll. I

5. A rolling mill comprising a rolling mill stand, said stand includingat least two upright laterally spaced support members, an upper chockassembly carried on each of said support members and being verticallyadjustable, a lower chock assembly supported on each of said standmembers below respective ones of said upper assemblies and beingvertically adjustable, a first horizontal roll rotatably supported insaid lower chock assemblies, one of said upper and said lower chockassemblies including a respective upper and lower rotatable sleeve, saidfirst horizontal roll being engageable in said lower sleeve for rotationtherewith, said lower sleeve having means for connecting the sleeve tomeans for rotating said sleeve and imparting rotatable motion to saidfirst horizontal roll, a second horizontal roll including a workingshaft rotatable in one of said chock assemblies and engageable with theupper sleeve member of the other of said chock assemblies for rotationtherewith, said upper sleeve member being rotatable in the associatedchock assembly and having means thereon for connecting said sleevemember to means to rotate said sleeve member and the shaft andassociated second horizontal roll, said first and second rolls extendingoutwardly from the said stand in an overhung manner, an auxiliary stand,a plurality of vertical rolls supported between said auxiliary stand andsaid roll stand in a position for cooperation with said first and secondhorizontal rolls.

6. A metal rolling mill comprising an upright roll supporting standdefining first and second spaced bearing supports for supporting atleast one mill roll, one of said bearing supports including a stationarybearing with a driving sleeve rotatable in said stationary bearing, amill roll having a working shaft portion rotatably supported in saidbearing supports and having one end extending into said driving sleeveand being of a configuration such that it peripherally interengages withsaid driving sleeve and is rotatable therewith, said driving sleeveincluding a portion extending outwardly from said upright rollsupporting stand adapted to be connected to means for rotating saidsleeve, said sleeve having an opening in the portion extending outwardlyfrom said stand alignable with an opening in the end of said mill rollworking shaft portion which extends into said sleeve, and a wedge memberextending through the opening of said sleeve and the opening of saidmill roll working shaft portion to hold said working shaft portion insaid sleeve.

7. A mill rolling device comprising an upright roll stand defining firstand second spaced bearing supports, a set of upper chock assembliesarranged in laterally spaced arrangement on respective said first andsecond spaced bearing supports and being displaceable upwardly anddownwardly in the respective bearing supports, a set of lower laterallyspaced chock assemblies arranged in respective first and second spacedbearing supports below said respective upper chock assemblies and beingvertically displaceable on said respective first and second bearingsupports, one of said upper chock assemblies and one of said lowerchocks assemblies having a stationary bearing portion and a drive sleeverotatable in said stationary bearing portion, respective upper and lowermill rolls each having a shaft portion extending into said drive sleeveand being rotatably supported in respective said upper and lower chockassemblies, said drive sleeves being engaged with the respective upperand lower mill roll shaft portions for rotation therewith fortransmitting torque thereto and means connected between said drivesleeves and said respective upper and lower mill roll shafts for lockingthem against relative axial displacement.

8. A rolling mill comprising a rolling mill stand, said mill standincluding at least two upright laterally spaced support members, anupper chock assembly carried on each of said support members and beingvertically adjustable, a lower chock assembly supported on each of saidstand members below respective ones of said upper assemblies and beingvertically adjustable, an upper horizontal roll rotatably supported insaid upper chock assemblies, a lower horizontal roll rotatably supportedin said lower chock assemblies, one of said upper and one of said lowerchock assemblies including a respective upper and lower rotatablesleeve, said upper sleeve having means for connecting the sleeve tomeans for rotating said sleeve and imparting rotatable motion to saidupper horizontal roll, a lower horizontal roll including a working shaftrotatable in one of said lower chock assemblies and engageable with thelower sleeve member of the other of said lower chock assemblies forrotation therewith, said lower sleeve member being rotatable in theassociated chock assembly and having means thereon for connecting saidlower sleeve member to means to rotate said lower sleeve member and saidlower horizontal roll, means connected through said lower horizontalroll and connected to said lower sleeve and means extending through saidupper horizontal roll and said upper sleeve for locking the associatedrolls and sleeves together and preventing relative axial movementtherebetween.

9. A rolling mill in particular a cold shaping rolling mill having atleast one horizontal roll pair and preferably being adapted forcooperation with a vertical roll pair arranged in a shaping planetherewith, comprising a roll stand including spaced bearing supports, atorque transmission sleeve member rotatably mounted in said stand in oneof said spaced bearing supports at an axially fixed position andextending outwardly at one side of said roll stand for connection tomeans for rotating said sleeve member, a roll member rotatably supportedby said spaced bearing supports and having an end working shaft portionextending into said sleeve member and being of a configuration tointerengage within said sleeve member in a manner preventing relativerotation of said sleeve member and said shaft portion, and meansextending through said working shaft portion and connected to saidsleeve member for anchoring said shaft portion axially in respect tosaid sleeve member and to hold said shaft portion within said sleevemember.

10. A rolling mill according to claim 8 wherein one of said upper chockassemblies includes a stationary hearing portion, said sleeve memberbeing rotatable in said bearing portion and anchored against axialdisplacement, said horizontal rolls being removable from said chockassemblies.

11. A rolling mill according to claim 10 wherein said horizontal rollsare connected to said sleeve members by square shaft means.

12. A rolling mill according to claim 10 wherein said horizontal rollsare connected to said sleeve member by a wedge member.

References Cited UNITED STATES PATENTS 109,953 12/ 1 S Singer 7689.2876,742 1/1908 Sneed 7689.2 1,938,932 12/1933 Rafter 72249 X 2,072,4483/ 1937 Hamill 72249 X 2,159,290 5/ 1939 Penkala 72238 CHARLES W.LANHAM, Primary Examiner.

G. P. CROSBY, C. H. HI'ITSON, Examiners.

6. A METAL ROLLING MILL COMPRISING AN UPRIGHT ROLL SUPPORTING STANDDEFINING FIRST AND SECOND SPACED BEARING SUPPORTS FOR SUPPORTING ATLEAST ONE MILL ROLL, ONE OF SAID BEARING SUPPORTS INCLUDING A STATIONARYBEARING WITH A DRIVING SLEEVE ROTATABLE IN SAID STATIONARY BEARING, AMILL ROLL HAVING A WORKING SHAFT PORTION ROTATABLY SUPPORTED IN SAIDBEARING SUPPORTS AND HAVING ONE END EXTENDING INTO SAID DRIVING SLEEVEAND BEING OF A CONFIGURATION SUCH THAT IT PERIPHERALLY INTERENGAGES WITHSAID DRIVING SLEEVE AND IS ROTATABLE THEREWITH, SAID DRIVING SLEEVEINCLUDING A PORTION EXTENDING OUTWARDLY FROM SAID UPRIGHT ROLLSUPPORTING STAND ADAPTED TO BE CONNECTED TO MEANS FOR ROTATING SAIDSLEEVE, SAID SLEEVE HAVING AN OPENING IN THE PORTION EXTENDING OUTWARDLYFROM SAID STAND ALIGNABLE WITH AN OPENING IN THE END OF SAID MILL ROLLWORKING SHAFT PORTION WHCH EXTENDS INTO SAID SLEEVE, AND A WEDGE MEMBEREXTENDING THROUGH THE OPENING OF SAID SLEEVE AND THE OPENING OF SAIDMILL ROLL WORKING SHAFT PORTION TO HOLD SAID WORKING SHAFT PORTION INSAID SLEEVE.